preflop: 5way limp, I check from the BB. Nothing wrong with that i guess.
flop: I have a gutshot out of position. My plan is to check/fold, or call if the bet is small. Against 4 other players i don't think i can lead out here.
turn: I hit, have a low straight and get a flushdraw. I lead out for value expecting to get called by flushdraws, or raised by a higher straight. <-- may not be correct?
There is one caller.
river: offsuite ace. I am still wary of the higher straight and I decide to raise/fold.

Is there a better play on the river? Would you suggest to raise/call, or check/call?

On turn i will bet more for protection.
There are still flushdraw and straith draw, who will call that 1/2 pot bet.
But i have no idea if i will be raised on turn..
I am affraid of flush more than straith.